Symptom

When the switch receives a local RARP for a MAC Address that was previously stored in the OTV ARP ND cache, it does not remove the ND cache entry.

Conditions

NX-OS Version 6.2.10 A MAC address moves across the overlay from a remote OTV site to the local site. OTV ARP ND cache is enabled

Workaround

OTV does not support RARP for now. This type of packet is not currently punted to SUP. OTV ARP entry will be expired in 10 minutes or get updated when ARP packets are received. If traffic is lost and it is really required that an ARP entry is removed on the RARP packet, we suggest to disable arp cache. Disable ARP ND Cache by applying the following command to the overlay interface: no otv suppress-arp-nd

Further Problem Description